<!DOCTYPE HTML>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html><head>
  <meta charset="utf-8">
  <title>Reference: Fragmentation of definite height, not top-of-page, forced breaks, and box-decoration-break:clone</title>
  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1144096">
  <style type="text/css">
html,body {
    color:black; background-color:white; font-size:16px; padding:0; margin:0;
}
body { overflow:hidden; }

.columns {
  position:relative;
     -moz-columns: 5;
      -ms-columns: 5;
  -webkit-columns: 5;
          columns: 5;
     -moz-column-fill: auto;
      -ms-column-fill: auto;
  -webkit-column-fill: auto;
          column-fill: auto;
  border: 2px dashed;
  margin-bottom: 5px;
}

.grid {
  display: grid;
  grid-template-columns: 30px 30px 30px;
  grid-auto-rows: 30px;
  grid-gap: 12px;
  border:5px solid;
}
span { background:lime; border:1px solid black; }
x { display:block; height:20px; }

.t { border-bottom-width:0; }
.b { border-top-width:0; }
.m { border-top-width:0; border-bottom-width:0; }

</style>
</head>
<body>

<div class="columns" style="height: 100px/*two rows would fit in 1st column*/">
<div style="padding-top:10px; background:grey">
<div class="grid">
<span><x></x></span>
<span class="t"><x></x></span>
<span class="t" style="background:cyan"><x></x></span>
</div>
<div style="height:40px;"></div>
<div class="grid" style="height:60px">
<span class="b"><x></x></span>
<span class="b" style="grid-area:1/3; height:6px; background:cyan"><x></x></span>
<span style="grid-area:1/3; align-self:end; background:pink"><x></x></span>
<span style="grid-row:1"><x></x></span>
<span><x></x></span>
</div></div></div>

<div class="columns" style="height:30px">
<div style="padding-top:10px; background:grey">
<div style="height:90px;border:5px solid;box-decoration-break: clone;"></div>
</div></div>

<div class="columns" style="height: 60px/*everything would fit in 1st column*/">
<div style="padding-top:10px; background:grey">
<div style="height:50px;"></div>
<div class="grid" style="padding-bottom:20px">
<span><x></x></span>
</div>
<div style="height:40px; border:5px solid;"></div>
</div></div></div>

<div class="columns" style="height: 100px/*everything would fit in 1st column*/">
<div style="padding-top:10px; background:grey">
<div class="grid">
<span class="t"><x></x></span>
<span class="t"><x></x></span>
<span class="t" style="background:cyan"><x></x></span>
</div>
<div style="height:40px;"></div>
<div class="grid" style="padding-bottom:30px">
<span class="b" style="grid-area:1/1; height:6px"><x></x></span>
<span style="align-self:end; grid-area:1/1; background:pink"><x></x></span>
<span class="b"><x></x></span>
<span class="b" style="height:6px; background:cyan"><x></x></span>
</div></div></div>

<div class="columns" style="height: 100px/*everything would fit in 1st column*/">
<div style="padding-top:10px; background:grey">
<div class="grid">
<span class="t"><x></x></span>
<span class="t"><x></x></span>
<span class="t" style="background:cyan"><x></x></span>
</div>
<div style="height:40px;"></div>
<div class="grid" style="padding-bottom:30px">
<span class="b" style="grid-area:1/1; height:6px"><x></x></span>
<span style="align-self:end; grid-area:1/1; background:pink"><x></x></span>
<span class="b"><x></x></span>
<span class="b" style="height:6px; background:cyan"><x></x></span>
</div></div></div>

<div class="columns" style="height: 100px/*everything would fit in 1st column*/">
<div style="padding-top:10px; background:grey">
<div style="height:90px;"></div>
<div class="grid" style="padding-bottom:18px">
<span style="height:35px"><x></x></span>
<span style="grid-row:span 2"><x></x></span>
<span style="height:35px; background:cyan"><x></x></span>
<span style="grid-area:2/1; align-self:end; background:pink"><x></x></span>
</div>
</div></div>

<div class="columns" style="height: 97px/*everything would fit in 1st column*/">
<div style="padding-top:10px; background:grey">
<div style="height:87px;"></div>
<div class="grid" style="padding-bottom:15px">
<span style="height:35px"><x></x></span>
<span style="grid-row:span 2"><x></x></span>
<span style="height:35px; background:cyan"><x></x></span>
<span style="grid-area:2/1; align-self:end; background:pink"><x></x></span>
</div>
<div style="height:3px;border:5px solid;box-decoration-break: clone;"></div>
</div></div>

<div class="columns" style="height: 80px/*one row fits in 1st column, two in 2nd column, but forced break there*/">
<div style="padding-top:30px; background:grey">
<div class="grid">
<span class="t"><x></x></span>
<span class="t" style="background:cyan"><x></x></span>
</div>
<div class="grid" style="padding-bottom:30px">
<span class="b" style="grid-area:1/1; height:6px"><x></x></span>
<span class="b" style="background:cyan"><x></x></span>
<span style="grid-area:1/1; align-self:end; background:pink"><x></x></span>
</div></div>
<div style="height:10px"></div>
<div class="grid m" style="height:0; margin-top:1px">
<span><x></x></span>
</div>
</div>

<div class="columns" style="height: 160px/*everything would fit in 1st column*/">
<div style="padding-top:30px; background:grey">
<div class="grid">
<span class="t" style="grid-row: span 2"><x></x></span>
<span style="grid-row: span 2"><x></x></span>
</div>
<div style="height:48px"></div>
<div style="height:18px; border:5px solid;">
<span class="b" style="display:block;height:29px;width:28px"></span>
</div>
</div></div>

</body>
</html>
